diff --git a/Library/Homebrew/bottles.rb b/Library/Homebrew/bottles.rb
index 5be1615f4c..278dc656e7 100644
--- a/Library/Homebrew/bottles.rb
+++ b/Library/Homebrew/bottles.rb
@@ -16,7 +16,7 @@ end
 
 def bottle_file_outdated? f, file
   filename = file.basename.to_s
-  return unless f.bottle && filename.match(bottle_regex)
+  return unless f.bottle && filename.match(Pathname::BOTTLE_EXTNAME_RX)
 
   bottle_ext = filename[bottle_native_regex, 1]
   bottle_url_ext = f.bottle.url[bottle_native_regex, 1]
@@ -38,10 +38,6 @@ def bottle_native_regex
   /(\.#{bottle_tag}\.bottle\.(\d+\.)?tar\.gz)$/o
 end
 
-def bottle_regex
-  Pathname::BOTTLE_EXTNAME_RX
-end
-
 def bottle_url(root_url, filename_options={})
   "#{root_url}/#{bottle_filename(filename_options)}"
 end